Cryptographic issues in AMD products - CVE-2021-46744
Published: May 26, 2022
Vulnerability identifier: #VU63692
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-46744
CWE-ID: CWE-310
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: AMD
Affected software:
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
AMD EPYC Embedded Processors
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
AMD EPYC Embedded Processors
Detailed vulnerability description
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a ciphertext side channel attack where data in specific cryptographic algorithms can be inferred in a SEV guest by monitoring the ciphertext values over time. A local user with access to the hypervisor can gain access to sensitive information, related to the guest OS.
How to mitigate CVE-2021-46744
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.